Made in 1929.
Colt official police with serial # 904734 was produced around 1965
your colt official police was made in 1958.
If your Colt official police is chambered in .22cal?Then it was made in 1937.
1940
1929
made about 1958
Manufactured in 1950
Around 1943.
1967
Made in 1941.
Made in 1964.
Call Colt and they will tell you.